Beispiel #1
0
// GetPodDaemonSets returns a list of daemon sets managing a pod.
// Returns an error if and only if no matching daemon sets are found.
func (s *StoreToDaemonSetLister) GetPodDaemonSets(pod *api.Pod) (daemonSets []extensions.DaemonSet, err error) {
	var selector labels.Selector
	var daemonSet extensions.DaemonSet

	if len(pod.Labels) == 0 {
		err = fmt.Errorf("No daemon sets found for pod %v because it has no labels", pod.Name)
		return
	}

	for _, m := range s.Store.List() {
		daemonSet = *m.(*extensions.DaemonSet)
		if daemonSet.Namespace != pod.Namespace {
			continue
		}
		selector = labels.Set(daemonSet.Spec.Selector).AsSelector()

		// If a daemonSet with a nil or empty selector creeps in, it should match nothing, not everything.
		if selector.Empty() || !selector.Matches(labels.Set(pod.Labels)) {
			continue
		}
		daemonSets = append(daemonSets, daemonSet)
	}
	if len(daemonSets) == 0 {
		err = fmt.Errorf("Could not find daemon set for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
	}
	return
}
Beispiel #2
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// GetPodControllers returns a list of replication controllers managing a pod. Returns an error only if no matching controllers are found.
func (s *StoreToReplicationControllerLister) GetPodControllers(pod *api.Pod) (controllers []api.ReplicationController, err error) {
	var selector labels.Selector
	var rc api.ReplicationController

	if len(pod.Labels) == 0 {
		err = fmt.Errorf("No controllers found for pod %v because it has no labels", pod.Name)
		return
	}

	for _, m := range s.Store.List() {
		rc = *m.(*api.ReplicationController)
		if rc.Namespace != pod.Namespace {
			continue
		}
		labelSet := labels.Set(rc.Spec.Selector)
		selector = labels.Set(rc.Spec.Selector).AsSelector()

		// If an rc with a nil or empty selector creeps in, it should match nothing, not everything.
		if labelSet.AsSelector().Empty() || !selector.Matches(labels.Set(pod.Labels)) {
			continue
		}
		controllers = append(controllers, rc)
	}
	if len(controllers) == 0 {
		err = fmt.Errorf("Could not find daemon set for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
	}
	return
}
Beispiel #3
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// TODO: Move this back to scheduler as a helper function that takes a Store,
// rather than a method of StoreToServiceLister.
func (s *StoreToServiceLister) GetPodServices(pod *api.Pod) (services []api.Service, err error) {
	var selector labels.Selector
	var service api.Service

	for _, m := range s.Store.List() {
		service = *m.(*api.Service)
		// consider only services that are in the same namespace as the pod
		if service.Namespace != pod.Namespace {
			continue
		}
		if service.Spec.Selector == nil {
			// services with nil selectors match nothing, not everything.
			continue
		}
		selector = labels.Set(service.Spec.Selector).AsSelector()
		if selector.Matches(labels.Set(pod.Labels)) {
			services = append(services, service)
		}
	}
	if len(services) == 0 {
		err = fmt.Errorf("Could not find service for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
	}

	return
}
Beispiel #4
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// GetPodControllers returns a list of jobs managing a pod. Returns an error only if no matching jobs are found.
func (s *StoreToJobLister) GetPodJobs(pod *api.Pod) (jobs []extensions.Job, err error) {
	var selector labels.Selector
	var job extensions.Job

	if len(pod.Labels) == 0 {
		err = fmt.Errorf("No jobs found for pod %v because it has no labels", pod.Name)
		return
	}

	for _, m := range s.Store.List() {
		job = *m.(*extensions.Job)
		if job.Namespace != pod.Namespace {
			continue
		}

		selector, _ = extensions.PodSelectorAsSelector(job.Spec.Selector)
		if !selector.Matches(labels.Set(pod.Labels)) {
			continue
		}
		jobs = append(jobs, job)
	}
	if len(jobs) == 0 {
		err = fmt.Errorf("Could not find jobs for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
	}
	return
}
Beispiel #5
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// List returns []*api.Pod matching a query.
func (f FakePodLister) List(s labels.Selector) (selected []*api.Pod, err error) {
	for _, pod := range f {
		if s.Matches(labels.Set(pod.Labels)) {
			selected = append(selected, pod)
		}
	}
	return selected, nil
}
Beispiel #6
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// MatchNamespace returns a generic matcher for a given label and field selector.
func MatchNamespace(label labels.Selector, field fields.Selector) generic.Matcher {
	return generic.MatcherFunc(func(obj runtime.Object) (bool, error) {
		namespaceObj, ok := obj.(*api.Namespace)
		if !ok {
			return false, fmt.Errorf("not a namespace")
		}
		fields := NamespaceToSelectableFields(namespaceObj)
		return label.Matches(labels.Set(namespaceObj.Labels)) && field.Matches(fields), nil
	})
}
Beispiel #7
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// MatchPersistentVolumeClaim returns a generic matcher for a given label and field selector.
func MatchPersistentVolumeClaim(label labels.Selector, field fields.Selector) generic.Matcher {
	return generic.MatcherFunc(func(obj runtime.Object) (bool, error) {
		persistentvolumeclaimObj, ok := obj.(*api.PersistentVolumeClaim)
		if !ok {
			return false, fmt.Errorf("not a persistentvolumeclaim")
		}
		fields := PersistentVolumeClaimToSelectableFields(persistentvolumeclaimObj)
		return label.Matches(labels.Set(persistentvolumeclaimObj.Labels)) && field.Matches(fields), nil
	})
}
Beispiel #8
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// Matcher returns a generic matcher for a given label and field selector.
func Matcher(label labels.Selector, field fields.Selector) generic.Matcher {
	return generic.MatcherFunc(func(obj runtime.Object) (bool, error) {
		sa, ok := obj.(*extensions.ThirdPartyResource)
		if !ok {
			return false, fmt.Errorf("not a ThirdPartyResource")
		}
		fields := SelectableFields(sa)
		return label.Matches(labels.Set(sa.Labels)) && field.Matches(fields), nil
	})
}
Beispiel #9
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// Matcher returns a generic matcher for a given label and field selector.
func Matcher(label labels.Selector, field fields.Selector) generic.Matcher {
	return generic.MatcherFunc(func(obj runtime.Object) (bool, error) {
		sa, ok := obj.(*api.ServiceAccount)
		if !ok {
			return false, fmt.Errorf("not a serviceaccount")
		}
		fields := SelectableFields(sa)
		return label.Matches(labels.Set(sa.Labels)) && field.Matches(fields), nil
	})
}
Beispiel #10
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// MatchResourceQuota returns a generic matcher for a given label and field selector.
func MatchResourceQuota(label labels.Selector, field fields.Selector) generic.Matcher {
	return generic.MatcherFunc(func(obj runtime.Object) (bool, error) {
		resourcequotaObj, ok := obj.(*api.ResourceQuota)
		if !ok {
			return false, fmt.Errorf("not a resourcequota")
		}
		fields := ResourceQuotaToSelectableFields(resourcequotaObj)
		return label.Matches(labels.Set(resourcequotaObj.Labels)) && field.Matches(fields), nil
	})
}
Beispiel #11
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// LabelsSelectorParam adds the given selector as a query parameter
func (r *Request) LabelsSelectorParam(s labels.Selector) *Request {
	if r.err != nil {
		return r
	}
	if s == nil {
		return r
	}
	if s.Empty() {
		return r
	}
	return r.setParam(unversioned.LabelSelectorQueryParam(r.apiVersion), s.String())
}
Beispiel #12
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// Please note that selector is filtering among the pods that have gotten into
// the store; there may have been some filtering that already happened before
// that.
func (s storePodsNamespacer) List(selector labels.Selector) (pods api.PodList, err error) {
	list := api.PodList{}
	for _, m := range s.store.List() {
		pod := m.(*api.Pod)
		if s.namespace == api.NamespaceAll || s.namespace == pod.Namespace {
			if selector.Matches(labels.Set(pod.Labels)) {
				list.Items = append(list.Items, *pod)
			}
		}
	}
	return list, nil
}
Beispiel #13
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// Please note that selector is filtering among the pods that have gotten into
// the store; there may have been some filtering that already happened before
// that.
//
// TODO: converge on the interface in pkg/client.
func (s *StoreToPodLister) List(selector labels.Selector) (pods []*api.Pod, err error) {
	// TODO: it'd be great to just call
	// s.Pods(api.NamespaceAll).List(selector), however then we'd have to
	// remake the list.Items as a []*api.Pod. So leave this separate for
	// now.
	for _, m := range s.Store.List() {
		pod := m.(*api.Pod)
		if selector.Matches(labels.Set(pod.Labels)) {
			pods = append(pods, pod)
		}
	}
	return pods, nil
}
Beispiel #14
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func (c *FakePods) List(label labels.Selector, field fields.Selector) (*api.PodList, error) {
	obj, err := c.Fake.Invokes(NewListAction("pods", c.Namespace, label, field), &api.PodList{})
	if obj == nil {
		return nil, err
	}
	list := &api.PodList{}
	for _, pod := range obj.(*api.PodList).Items {
		if label.Matches(labels.Set(pod.Labels)) {
			list.Items = append(list.Items, pod)
		}
	}
	return list, err
}
func (c *FakeHorizontalPodAutoscalers) List(label labels.Selector, field fields.Selector) (*extensions.HorizontalPodAutoscalerList, error) {
	obj, err := c.Fake.Invokes(NewListAction("horizontalpodautoscalers", c.Namespace, label, field), &extensions.HorizontalPodAutoscalerList{})
	if obj == nil {
		return nil, err
	}
	list := &extensions.HorizontalPodAutoscalerList{}
	for _, a := range obj.(*extensions.HorizontalPodAutoscalerList).Items {
		if label.Matches(labels.Set(a.Labels)) {
			list.Items = append(list.Items, a)
		}
	}
	return list, err
}
Beispiel #16
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func (c *FakeDeployments) List(label labels.Selector, field fields.Selector) (*extensions.DeploymentList, error) {
	obj, err := c.Fake.Invokes(NewListAction("deployments", c.Namespace, label, field), &extensions.DeploymentList{})
	if obj == nil {
		return nil, err
	}
	list := &extensions.DeploymentList{}
	for _, deployment := range obj.(*extensions.DeploymentList).Items {
		if label.Matches(labels.Set(deployment.Labels)) {
			list.Items = append(list.Items, deployment)
		}
	}
	return list, err
}
Beispiel #17
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// GetPodControllers gets the ReplicationControllers that have the selector that match the labels on the given pod
func (f FakeControllerLister) GetPodControllers(pod *api.Pod) (controllers []api.ReplicationController, err error) {
	var selector labels.Selector

	for _, controller := range f {
		if controller.Namespace != pod.Namespace {
			continue
		}
		selector = labels.Set(controller.Spec.Selector).AsSelector()
		if selector.Matches(labels.Set(pod.Labels)) {
			controllers = append(controllers, controller)
		}
	}
	if len(controllers) == 0 {
		err = fmt.Errorf("Could not find Replication Controller for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
	}

	return
}
Beispiel #18
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// GetPodServices gets the services that have the selector that match the labels on the given pod
func (f FakeServiceLister) GetPodServices(pod *api.Pod) (services []api.Service, err error) {
	var selector labels.Selector

	for _, service := range f {
		// consider only services that are in the same namespace as the pod
		if service.Namespace != pod.Namespace {
			continue
		}
		selector = labels.Set(service.Spec.Selector).AsSelector()
		if selector.Matches(labels.Set(pod.Labels)) {
			services = append(services, service)
		}
	}
	if len(services) == 0 {
		err = fmt.Errorf("Could not find service for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
	}

	return
}
Beispiel #19
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// CheckServiceAffinity ensures that only the nodes that match the specified labels are considered for scheduling.
// The set of labels to be considered are provided to the struct (ServiceAffinity).
// The pod is checked for the labels and any missing labels are then checked in the node
// that hosts the service pods (peers) for the given pod.
//
// We add an implicit selector requiring some particular value V for label L to a pod, if:
// - L is listed in the ServiceAffinity object that is passed into the function
// - the pod does not have any NodeSelector for L
// - some other pod from the same service is already scheduled onto a node that has value V for label L
func (s *ServiceAffinity) CheckServiceAffinity(pod *api.Pod, existingPods []*api.Pod, nodeID string) (bool, error) {
	var affinitySelector labels.Selector

	// check if the pod being scheduled has the affinity labels specified in its NodeSelector
	affinityLabels := map[string]string{}
	nodeSelector := labels.Set(pod.Spec.NodeSelector)
	labelsExist := true
	for _, l := range s.labels {
		if nodeSelector.Has(l) {
			affinityLabels[l] = nodeSelector.Get(l)
		} else {
			// the current pod does not specify all the labels, look in the existing service pods
			labelsExist = false
		}
	}

	// skip looking at other pods in the service if the current pod defines all the required affinity labels
	if !labelsExist {
		services, err := s.serviceLister.GetPodServices(pod)
		if err == nil {
			// just use the first service and get the other pods within the service
			// TODO: a separate predicate can be created that tries to handle all services for the pod
			selector := labels.SelectorFromSet(services[0].Spec.Selector)
			servicePods, err := s.podLister.List(selector)
			if err != nil {
				return false, err
			}
			// consider only the pods that belong to the same namespace
			nsServicePods := []*api.Pod{}
			for _, nsPod := range servicePods {
				if nsPod.Namespace == pod.Namespace {
					nsServicePods = append(nsServicePods, nsPod)
				}
			}
			if len(nsServicePods) > 0 {
				// consider any service pod and fetch the node its hosted on
				otherNode, err := s.nodeInfo.GetNodeInfo(nsServicePods[0].Spec.NodeName)
				if err != nil {
					return false, err
				}
				for _, l := range s.labels {
					// If the pod being scheduled has the label value specified, do not override it
					if _, exists := affinityLabels[l]; exists {
						continue
					}
					if labels.Set(otherNode.Labels).Has(l) {
						affinityLabels[l] = labels.Set(otherNode.Labels).Get(l)
					}
				}
			}
		}
	}

	// if there are no existing pods in the service, consider all nodes
	if len(affinityLabels) == 0 {
		affinitySelector = labels.Everything()
	} else {
		affinitySelector = labels.Set(affinityLabels).AsSelector()
	}

	node, err := s.nodeInfo.GetNodeInfo(nodeID)
	if err != nil {
		return false, err
	}

	// check if the node matches the selector
	return affinitySelector.Matches(labels.Set(node.Labels)), nil
}